[Jukebox-list] AMI C problems

[Gary Young]

Hi Rick, if you manually lift the selection
finger/lever and nothing happens, but you can make the
mech work by tripping the the switch/es at the front
of the mech manually, then it sounds like the problem
may be in the motor itself. First you want to
establish that the contacts on the switch at the back
of the mech are clean and adjusted (this is the switch
with the long plate that stradles the two metal bars
and is operated when one of the bars is raised. I
think this may be referred to as the bale switch in
the manual. It could also be that the carbon brushes
in the motor are worn and not making enough contact on
the commutator. When you make a selection, try
"helping" the motor a bit by turning the end of the
rotor and see if it is trying to work. If this motor
has not been apart in its lifetime, then it would not
do any harm to strip it down and clean all the
parts,including the copper commutator. You may also
find that all the grease has become hardened over the
years. Also carefully clean in between the copper
segments of the commutator. For cleaning the parts, I
used a bath of gasoline (petrol here in the UK) and a
stiff paint brush, which I found to be effective. For
obvious reasons, do this outside or in a well
ventilated area and protect your eyes and skin. Others
may suggest something different. Carefully take out
the carbon brushes which are located one either side
of the motor. These are tensioned by springs. If you
find that the brushes are not worn, it is important to
put them back exactly as they came out, ie they will
have been worn down to follow the contours of the
motor, so make sure you dont turn them on their side
when putting them back. If they are worn and need
replaced and you cant source correct replacements, As
a make do, I have used brushes from an old
hoover/Vacumn cleaner in the past. You may have to
file them down to size and shape. The same cleaning
principle I mentioned applies to the other motor, but
it may be best to do one first to see if it works. If
this doesnt solve the problem, the only other
possibility I can think of is the 2 micro switches at
the front of the machine. I have tried to describe as
best I can what I think is wrong, but not being a
technician, I will happily bow to superior knowledge.
Let us know how it goes. Lets keep the jukeboxes
playing. Good luck Gary


		
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